<template>
  <div>
    <span v-for="(item, index) in arr" :key="index"
      ><input type="checkbox" name="" id="" v-model="val" :value="item" />{{
        item
      }}</span
    >
    <p>你选中得元素,累加的值和为：{{total}}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      val: [],
    }
  },
  computed:{
    total(){
      return this.val.reduce((acc,item)=>acc+=item,0)
    }
  }
}
</script>

<style></style>
